Wireless LAN with channel swapping between DFS access points
First Claim
1. An access point for a wireless LAN communication network, comprising:
- a first processing unit adapted to;
(a) send probe requests and probe responses to other access points, (b) receive probe requests and probe responses from other access points (c) calculate an interference parameter for each of a plurality of its possible channels (d) calculate a channel sharing parameter for each of said plurality of channels (e) calculate a regular channel quality parameter (regCSIQ) for each of said plurality of channels, indicative of the amount of interference and channel sharing on each of said plurality of channels, using said interference and channel sharing parameters (f) dynamically select an optimum channel from said plurality of possible channels using said regular channel quality parameters (regCSIQ), wherein said access point is arranged to select said optimum channel by mutually swapping channels with another access point using a swapping mechanism.
9 Assignments
0 Petitions
Accused Products
Abstract
The present invention enhances the dynamic frequency selection 9DFS) algorithms used in Wireless LANs by adding a channel swapping mechanism. The aim of the traditional DFS algorithm is to dynamically select channels in a wireless LAN in such a way that the best performance is achieved. However, not always the optimal channel selection is achieved. This invention describes an addition to the DFS algorithm in such a way that two APs can decide to swap channels instead of one AP switching to another channel. To avoid the problem of sub-optimal channel selection, a requesting AP sends Swap Requests to other APs in order to sense the willingness of other APs to swap channels with the requesting AP.
222 Citations
8 Claims
-
1. An access point for a wireless LAN communication network, comprising:
a first processing unit adapted to;
(a) send probe requests and probe responses to other access points, (b) receive probe requests and probe responses from other access points (c) calculate an interference parameter for each of a plurality of its possible channels (d) calculate a channel sharing parameter for each of said plurality of channels (e) calculate a regular channel quality parameter (regCSIQ) for each of said plurality of channels, indicative of the amount of interference and channel sharing on each of said plurality of channels, using said interference and channel sharing parameters (f) dynamically select an optimum channel from said plurality of possible channels using said regular channel quality parameters (regCSIQ), wherein said access point is arranged to select said optimum channel by mutually swapping channels with another access point using a swapping mechanism. - View Dependent Claims (2, 3, 4, 5, 6)
-
7. Method of selecting an optimum channel by an access point in a wireless LAN communication network, comprising the steps of:
-
(a) sending probe requests and probe responses to other access points (b) receiving probe requests and probe responses from other access points (c) calculating an interference parameter for each of a plurality of its possible channels (d) calculating a channel sharing parameter for each of said plurality of channels (e) calculating a regular channel quality parameter (regCSIQ) for each of said plurality of channels, indicative of the amount of interference and channel sharing on each of said plurality of channels, using interference and channel sharing parameters; and
(d) dynamically selecting an optimum channel from said plurality of possible channels using said regular channel quality parameters (regCSIQ), wherein said access point is arrange to select said optimum channel by mutually swapping channels with another access point using a swapping mechanism.
-
-
8. Computer program product to be loaded by an access point for a wireless LAN communication network, said computer program product providing said access point with the capacity to:
-
(a) send probe requests and probe responses to other access points (b) receive probe requests and probe responses from other access points (c) calculate an interference parameter for each of a plurality of its possible channels (d) calculate a channel sharing parameter for each of said plurality of channels (e) calculate a regular channel quality parameter (regCSIQ) for each of said plurality of channels, indicative of the amount of interference and channel sharing on each of said plurality of channels, using said interference and channel sharing parameters (f) dynamically select an optimum channel from said plurality of possible channels using said regular channel quality parameters (regCSIQ), wherein said access point is arranged to select said optimum channel by mutually swapping channels with another access point using a swapping mechanism.
-
Specification